body, html
  line-height: 1
  font-weight: 200
  font-family: 'PingFang SC', 'STHeitiSC-Light', 'Helvetica-Light', arial, sans-serif

@media (-webkit-min-device-pixel-ratio: 1.5),(min-device-pixel-ratio: 1.5)
  .border-1px
    &:after
      transform: scaleY(.7)
    &:before
      transform: scaleY(.7)

@media (-webkit-min-device-pixel-ratio: 2.0),(min-device-pixel-ratio: 2.0)
  .border-1px
    &:after
      transform: scaleY(.5)
    &:before
      transform: scaleY(.5)

.clearfix
  display: inline-block
  &:after
    display: block
    content: '.'
    height: 0
    line-height: 0
    clear: both
    visibility: hidden
